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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-4122) ClassCastException in SQLClob when running in soft upgrade mode (10.4.2.0 -> 10.5.1.0)
Date Mon, 06 Apr 2009 15:26:13 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4122?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kristian Waagan updated DERBY-4122:
-----------------------------------

    Attachment: derby-4122-4b-classcast_fix_mark_reset.diff

Thanks for looking at the patch again, Knut Anders.

I have moved the new message to MessageId. It wasn't immediately clear to me what to name
the message and into which category it should be placed. We can move/rename it later if required.

Regarding the EOFException, I have chosen to keep it as it is for now because other methods
in the class use it too. It may be that it should be changed, but it must be tested. Since
ReaderToUTF8Stream has been considered an "internal stream class" it is not clear to me whether
Derby code expects the EOFException or not.

I also want to improve the test a bit, by making the randomized test verify the content returned
by the stream. Depending on when I get around to do it, I may do this under this issue or
create a sub-issue.

> ClassCastException in SQLClob when running in soft upgrade mode (10.4.2.0 -> 10.5.1.0)
> --------------------------------------------------------------------------------------
>
>                 Key: DERBY-4122
>                 URL: https://issues.apache.org/jira/browse/DERBY-4122
>             Project: Derby
>          Issue Type: Bug
>          Components: Regression Test Failure
>    Affects Versions: 10.5.1.0
>         Environment: Windows Vista 64, Sun JDK 1.6.0_10, Junit 3.8.2
>            Reporter: Suran Jayathilaka
>            Assignee: Kristian Waagan
>            Priority: Blocker
>         Attachments: derby-4122-1a-incorrect_stream_positioning.diff, derby-4122-2a-bc4btest.diff,
derby-4122-3a-classcast_fix.diff, derby-4122-3b-classcast_fix.diff, derby-4122-4a-classcast_fix_mark_reset.diff,
derby-4122-4b-classcast_fix_mark_reset.diff, derby-4122-4b-classcast_fix_mark_reset.diff
>
>
> This bug was found when doing soft upgrade testing from Derby version 10.4.2.0 to 10.5.1.0
(RC1)
> Steps followed are as follows.
> 1. Run setEmbeddedCP.bat from version 10.4.2.0's bin folder
> 2. In a test folder run ij
> 3. create system/wombat database.
>     ij> connect 'jdbc:derby:system/wombat;create=true';
> 4. exit ij
> 5. Copy the 10.5.1.0 derby jars (from lib folder) and the derbyTesting.jar from 10.4.2.0
to the test folder and set classpath with them (including junit and ORO)
> 6. Run suites.All 
>      java -Xmx512M -Xms512M -Dderby.tests.trace=true junit.textui.TestRunner org.apache.derbyTesting.functionTests.suites.All
> Result:
> Tests run: 10479,  Failures: 56,  Errors: 34
> The exception stack trace from a failed test follows.
> -------------------------------------------------------------------------------------------------------------
> 3) testClobInTriggerTable(org.apache.derbyTesting.functionTests.tests.lang.TriggerTest)java.sql.SQLException:
Java exception: 'org.apache.derby.iapi.types.ReaderToUTF8Stream cannot be cast to org.apache.derby.iapi.types.Resetable:
java.lang.ClassCastException'.
> 	at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
> 	at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
> 	at org.apache.derby.impl.jdbc.Util.javaException(Unknown Source)
> 	at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown Source)
> 	at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown Source)
> 	at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)
> 	at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown Source)
> 	at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown Source)
> 	at org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(Unknown Source)
> 	at org.apache.derby.impl.jdbc.EmbedPreparedStatement.execute(Unknown Source)
> 	at org.apache.derbyTesting.functionTests.tests.lang.TriggerTest.testClobInTriggerTable(TriggerTest.java:529)
> 	at org.apache.derbyTesting.functionTests.tests.lang.TriggerTest.testClobInTriggerTable(TriggerTest.java:451)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java:102)
> 	at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
> 	at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
> 	at junit.extensions.TestSetup.run(TestSetup.java:25)
> 	at org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)
> Caused by: java.sql.SQLException: Java exception: 'org.apache.derby.iapi.types.ReaderToUTF8Stream
cannot be cast to org.apache.derby.iapi.types.Resetable: java.lang.ClassCastException'.
> 	at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
> 	at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown
Source)
> 	... 39 more
> Caused by: java.lang.ClassCastException: org.apache.derby.iapi.types.ReaderToUTF8Stream
cannot be cast to org.apache.derby.iapi.types.Resetable
> 	at org.apache.derby.iapi.types.SQLClob.rewindStream(Unknown Source)
> 	at org.apache.derby.iapi.types.SQLClob.readExternal(Unknown Source)
> 	at org.apache.derby.iapi.types.SQLChar.getString(Unknown Source)
> 	at org.apache.derby.iapi.types.SQLChar.loadStream(Unknown Source)
> 	at org.apache.derby.impl.sql.execute.UpdateResultSet.objectifyStream(Unknown Source)
> 	at org.apache.derby.impl.sql.execute.UpdateResultSet.collectAffectedRows(Unknown Source)
> 	at org.apache.derby.impl.sql.execute.UpdateResultSet.open(Unknown Source)
> 	at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(Unknown Source)
> 	at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown Source)
> 	... 32 more
> ------------------------------------------------------------------------------------------------------------------
> When looking at the SVN revisions for SQLClob with Kathey Marsden, we found the following
statement in revision # 738408, related to DERBY-3907, which might be related to this issue.
> "NOTE: Databases created with this revision (or later) containing Clobs, cannot be accessed
by earlier trunk revisions."
> Patch file: derby-3907-7a3-use_new_header_format.diff
>       

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